For the Inventor, By the Inventor

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Houston, TX, United States of America

Nine Downhole Technologies, LLC

USPTO Granted Patents = 21

CIPO Patents = 1

Forward Citations = 35

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11 inventors (with patents filed for the assignee):

Donald Roy Greenlee (14 out of 21 patents)

Donald Jonathan Greenlee (10 out of 16 patents)

Viggo Brandsdal (5 out of 21 patents)

4. Geir Valestrand Aasheim (3 out of 4 patents)

5. W Lynn Frazier (2 out of 69 patents)

6. Steven N Bailey (2 out of 5 patents)

7. Ronald Abt (2 out of 2 patents)

8. Brian Oligschlaeger (2 out of 2 patents)

9. Jon Greenlee (2 out of 2 patents)

10. Brian David Oligschlaeger (1 out of 1 patent)

11. Geir Aasheim (1 out of 1 patent)

21 patents: Sort by Forward Citations

1. 12723485 - Compact downhole tool (2026-09-01),

2. 12637933 - Frac dart (2026-05-26),

3. 12631104 - Frac dart (2026-05-19),

4. 12590505 - Compact downhole tool (2026-03-31),

5. 12516585 - Compact downhole tool (2026-01-06),

6. 12312911 - Multi-cycle counter system (2025-05-27),

7. 12215565 - Compact downhole tool (2025-02-04),

8. 11970922 - Multi-cycle counter system (2024-04-30),

9. 11946333 - Cup plug having a large flow-through inside diameter (2024-04-02),

10. 11891878 - Gas capable frangible disc barrier valve (2024-02-06),

11. 11761289 - Shearable sleeve (2023-09-19),

12. 11713649 - Plugging device (2023-08-01),

13. 11697975 - Compact downhole tool (2023-07-11),

14. 11578559 - Gas capable frangible disc barrier valve (2023-02-14),

15. 11459839 - Sleeve for downhole tools (2022-10-04),

Nine Downhole Technologies, LLC is a leading provider of specialized downhole tools and services for the oil and gas industry. With a focus on innovation and quality, we offer a range of products including drilling motors, measurement while drilling (MWD) tools, and drilling jars. Our team of experts is dedicated to delivering reliable solutions to optimize drilling performance and maximize efficiency.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

21 Patents

#249 in Houston, TX

#923 in Texas

#15,668 in US

#29,893 in the World

Houston, TX, United States of America

Nine Downhole Technologies, LLC

Forward Citations = 35

11 inventors:

Donald Roy Greenlee (14 out of 21 patents)

Donald Jonathan Greenlee (10 out of 16 patents)

Viggo Brandsdal (5 out of 21 patents)

4. Geir Valestrand Aasheim (3 out of 4 patents)

5. W Lynn Frazier (2 out of 69 patents)

Please report any incorrect information to [email protected]

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